this.y = height/2;

  this.x = 64; 

  this.kitten = images

  this.gravity= 0.6;

  this.lift =-15; 

  this.velocity =0; 

  this.show = function(){

    fill(255);

    ellipse(this.x, this.y, 32,32);

  }

  this.up =function (){

    this.velocity += this.lift;  

  }

  this.update = function (){

    this.velocity +=this.gravity;

    this.velocity *=0.9;

    this.y += this.velocity; 

    if(this.y> height-16){

      this.y= height-16; 

      this.velocity = 0; 

       }

    if(this.y< 0){

      this.y= 0  ; 

      this.velocity = 0 ; 

       } 

  }

}